CN115959260A - Full-pressure type LPG transport ship cargo tank integrity hoisting construction process - Google Patents
Full-pressure type LPG transport ship cargo tank integrity hoisting construction process Download PDFInfo
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- CN115959260A CN115959260A CN202211616578.0A CN202211616578A CN115959260A CN 115959260 A CN115959260 A CN 115959260A CN 202211616578 A CN202211616578 A CN 202211616578A CN 115959260 A CN115959260 A CN 115959260A
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- cargo tank
- laminated wood
- saddle
- cargo
- temporary
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- 238000010276 construction Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000008569 process Effects 0.000 title claims abstract description 11
- 239000002023 wood Substances 0.000 claims abstract description 49
- 239000004593 Epoxy Substances 0.000 claims abstract description 24
- 238000003466 welding Methods 0.000 claims abstract description 15
- 238000009434 installation Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 238000005192 partition Methods 0.000 claims abstract description 9
- 239000007799 cork Substances 0.000 claims abstract description 8
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000011248 coating agent Substances 0.000 claims abstract description 4
- 238000000576 coating method Methods 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 230000009471 action Effects 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 3
- 229920000647 polyepoxide Polymers 0.000 claims description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/30—Use of alternative fuels, e.g. biofuels
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- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention provides a cargo tank integrity hoisting construction process of a full-pressure LPG transport ship, which comprises the following steps of: marking the installation position of the laminated wood and the installation position of the positioning tool on the cargo tank; arranging a temporary saddle in an inner field, and placing the cargo tank on the temporary saddle by using a gantry crane; welding a step bridge section on the top of the cargo tank, welding a watertight partition plate on the cargo tank below the step bridge, and welding positioning tools on two sides of the cargo tank; installing laminated wood at the bottom of a cargo tank, and pouring epoxy; hoisting the cargo tank again by using a gantry crane, arranging a layer of adjusting cork on the panel of the temporary saddle, and controlling the gantry crane to stably drop the cargo tank on the temporary saddle; carrying out a water pressure test on the cargo tank; coating the cargo tank; carrying out initial positioning on the cargo tank; epoxy pouring and filling are carried out on the gap between the laminated wood and the saddle panel, and the hoisting is finished; the folding ends between the sections of the step bridge are connected by steel plates. The construction process reduces the construction difficulty, shortens the construction period and eliminates the potential safety hazard in construction.
Description
Technical Field
The invention relates to the technical field of ship construction, in particular to a full-pressure type LPG transport ship cargo tank integrity hoisting construction process.
Background
With the increasingly stricter requirements on low carbon emission reduction, as a green energy source, the LPG has attracted more and more extensive attention, the ship LPG transportation industry has been rapidly developed in these years, and a full-pressure LPG transportation ship is characterized in that normal-temperature and high-pressure liquefied LPG is stored in a cargo tank, the upper half part of the cargo tank is exposed in the air, a foot bridge, a watertight partition plate and the like are required to be installed on the cargo tank, in the past, after the cargo tank is built, construction of epoxy and laminated wood is carried out in the hoisting process, the construction space is narrow, the construction difficulty is high, greater potential safety hazards exist for constructors, after the hoisting is finished, the watertight partition plate, the foot bridge and the like are installed, and the ship is in a floating state on the water surface during installation, so that the installation difficulty is high, the installation time is long, and meanwhile, the potential water falling hazard exists in high altitude operation.
Disclosure of Invention
The invention aims to provide a full-pressure type LPG transport ship cargo tank integrity hoisting construction process aiming at the defects in the prior art, wherein laminated wood, a step bridge, a watertight partition plate and other parts are assembled with a cargo tank in advance to form an integral cargo tank unit before the cargo tank is hoisted, and finally, the whole cargo tank unit is hoisted, so that the construction difficulty is reduced, and the construction period is shortened.
In order to realize the purpose, the invention adopts the technical scheme that:
a full-pressure type LPG transport ship cargo tank integrity hoisting construction process comprises the following steps:
after the ship body is segmented and folded, each cargo tank corresponds to two saddles, the distance between the two saddles is measured, the mounting position of laminated wood at the bottom of the cargo tank and the mounting positions of the positioning tools at two sides of the cargo tank are determined according to the actual sizes of the saddles, the mounting positions of the laminated wood are marked at the bottom of the cargo tank, and the mounting positions of the positioning tools are marked at two sides of the cargo tank;
step two, arranging 4 temporary saddles in an inner field, wherein the size of each temporary saddle is the same as that of a saddle installed on a ship body in a segmented manner, each two temporary saddles correspond to one cargo tank, a first cargo tank and a second cargo tank are respectively laid on the temporary saddles by using a gantry crane, the arrangement positions of the temporary saddles are positioned on the inner sides of the installation positions of laminated wood at the bottoms of the cargo tanks, and the temporary saddles and the installation positions of the laminated wood are arranged in parallel; step three, respectively welding a first step bridge section and a second step bridge section on the top of the first cargo tank and the top of the second cargo tank, respectively welding step bridge railings on the first step bridge section and the second step bridge section, reserving closure gaps at closure ends of the first step bridge section and the second step bridge section, welding watertight partition plates on the cargo tanks below the first step bridge and the second step bridge, and respectively welding a positioning tool on two sides of the first cargo tank and the second cargo tank according to marks;
step four, installing laminated wood at the bottom of the cargo tank, pouring epoxy between the laminated wood and the cargo tank, and after epoxy pouring is finished, supporting the bottom of each laminated wood by using a wood bracket until the epoxy is cured;
hoisting the first cargo tank and the second cargo tank again by using a gantry crane, uniformly arranging a layer of adjusting cork on a panel of the temporary saddle, respectively moving two temporary saddles corresponding to each cargo tank to the lower parts of laminated wood, controlling the gantry crane to stably drop the cargo tanks on the temporary saddle, and enabling the laminated wood at the bottom of the cargo tanks to correspond to the positions of the adjusting cork on the panel of the saddle;
step six, carrying out water pressure test on the cargo tank;
seventhly, coating operation is carried out on the cargo tank;
step eight, hoisting the cargo tank to the position above a saddle of the ship body section by using a gantry crane through the combined action of a limiting tool for limiting the cargo tank on the periphery of the cargo tank and a positioning tool for positioning the cargo tank, and stopping the cargo tank from falling when the gap between laminated wood and a saddle panel meets the thickness requirement of epoxy pouring;
step nine, performing epoxy pouring filling on a gap between the laminated wood and the saddle panel from low to high, after the epoxy pouring is finished, slowly loosening the cargo tank to enable the cargo tank to be completely fallen on the saddle, completely filling the gap between the saddle panel and the laminated wood, removing redundant epoxy resin overflowing from the two sides of the saddle, finishing the hoisting, and removing a gantry crane hook lock;
step ten, connecting the folding ends between the first-step bridge section and the second-step bridge section by using steel plates to finish the integral hoisting of the first cargo tank and the second cargo tank.
Compared with the prior art, the invention has the following advantages:
1. the laminated wood, the step bridge and the watertight partition plate are assembled with the cargo tank in advance in an interior field, the saddle is hoisted in the form of the whole module unit, the process is advanced, and compared with the installation of the laminated wood, the step bridge and the watertight partition plate after the cargo tank is hoisted, the construction difficulty is reduced, the construction period is greatly shortened, and the potential safety hazard during construction is eliminated.
2. When the water pressure test is carried out on the cargo tank, the cargo tank is required to be dropped on the saddle to ensure enough supporting strength, but the water pressure test is carried out after the cargo tank is dropped on the actual saddle of the ship body, and once the test result of the cargo tank cannot reach the standard and the conditions of pressure release and water leakage occur, the cargo tank is required to be checked and maintained in a narrow space of the cargo hold, so that the operation difficulty is high, the consumed time is long, and other structures in the cargo hold are easy to damage.
Drawings
FIG. 1 is a construction flow chart of the present invention
Detailed Description
The present invention is further illustrated by the following description in conjunction with the accompanying drawings, which are to be construed as merely illustrative and not limitative of the remainder of the disclosure, and on reading the disclosure, various equivalent modifications thereof will become apparent to those skilled in the art and fall within the limits of the appended claims.
As shown in fig. 1, a full pressure type LPG carrier cargo tank integrity hoisting construction process includes the following steps:
after the ship body is folded in sections, each cargo tank corresponds to two saddles, the distance between the two saddles is measured, the mounting position of laminated wood at the bottom of the cargo tank and the mounting positions of the positioning tools at two sides of the cargo tank are determined according to the actual sizes of the saddles, the mounting positions of the laminated wood are marked at the bottom of the cargo tank, and the mounting positions of the positioning tools are marked at two sides of the cargo tank;
arranging 4 temporary saddles in an inner field, wherein the sizes of the temporary saddles are the same as those of saddles installed on the ship body in sections, each two temporary saddles correspond to one cargo tank, the first cargo tank and the second cargo tank are respectively laid on the temporary saddles by using a gantry crane, the arrangement positions of the temporary saddles are positioned on the inner sides of the installation positions of laminated wood at the bottoms of the cargo tanks, and the temporary saddles and the installation positions of the laminated wood are arranged in parallel; step three, respectively welding a first step bridge section and a second step bridge section on the top of the first cargo tank and the top of the second cargo tank, respectively welding step bridge railings on the first step bridge section and the second step bridge section, reserving closure notches at closure ends of the first step bridge section and the second step bridge section, welding watertight partition plates on the cargo tanks below the first step bridge and the second step bridge, and respectively welding a positioning tool on two sides of the first cargo tank and the second cargo tank according to marks;
step four, installing laminated wood at the bottom of the cargo tank, pouring epoxy between the laminated wood and the cargo tank, wherein the pouring thickness of the epoxy is 3-8mm, and after the epoxy pouring is finished, the bottom of each laminated wood is supported by a wooden support until the epoxy is cured;
hoisting the first cargo tank and the second cargo tank again by using a gantry crane, uniformly arranging a layer of adjusting cork on a panel of the temporary saddle, respectively moving two temporary saddles corresponding to each cargo tank to the lower parts of the laminated wood, controlling the gantry crane to stably drop the cargo tanks on the temporary saddle, and enabling the laminated wood at the bottom of the cargo tanks to correspond to the positions of the adjusting cork on the panel of the saddle; there is the precision tolerance between cargo tank and the interim saddle, and cargo tank bottom can't laminate completely with the panel of interim saddle, and laminated wood hugs closely cargo tank bottom and arranges, and consequently laminated wood also can't laminate completely with the panel of interim saddle, and laminated wood's hardness is great, consequently need lay one deck adjustment cork on the panel of interim saddle, replaces the epoxy between laminated wood and saddle panel, can simulate out the true state that cargo tank fell on the saddle panel completely.
Step six, carrying out water pressure test on the cargo tank; the water pressure test is carried out on the cargo tank in the inner field in advance, once the problem of pressure release and leakage of the cargo tank occurs, the cargo tank can be maintained more conveniently in the inner field, and compared with the water pressure test carried out after hoisting, once the problem is found, the operation can be carried out only in a narrow space of the cargo hold, and the operation difficulty is higher;
seventhly, coating operation is carried out on the cargo tank;
step eight, hoisting the cargo tank to the position above a saddle of the ship body section by using a gantry crane through the combined action of a limiting tool for limiting the cargo tank and a positioning tool for positioning the cargo tank on the periphery of the cargo hold, and performing primary positioning, wherein when the gap between laminated wood and a saddle panel meets the thickness requirement of epoxy casting, the cargo tank stops falling;
step nine, performing epoxy pouring filling on a gap between laminated wood and a saddle panel from low to high, wherein the pouring thickness of epoxy is 5-25mm, after the epoxy pouring is finished, slowly loosening a cargo tank to enable the cargo tank to completely fall on a saddle, completely filling the gap between the saddle panel and the laminated wood, removing redundant epoxy resin overflowing from two sides of the saddle, finishing the hoisting, and removing a gantry crane hook lock;
step ten, connecting the closure ends between the first-step bridge section and the second-step bridge section by using steel plates to finish the integral hoisting of the first cargo tank and the second cargo tank.
While the foregoing specification illustrates and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the precise forms disclosed herein and is not to be interpreted as excluding the existence of additional embodiments that are also intended to be encompassed by the present invention as modified within the spirit and scope of the invention as described herein. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (1)
1. The integral hoisting construction process for the cargo tank of the full-pressure LPG transport ship is characterized by comprising the following steps of:
after the ship body is segmented and folded, each cargo tank corresponds to two saddles, the distance between the two saddles is measured, the mounting position of laminated wood at the bottom of the cargo tank and the mounting positions of the positioning tools at two sides of the cargo tank are determined according to the actual sizes of the saddles, the mounting positions of the laminated wood are marked at the bottom of the cargo tank, and the mounting positions of the positioning tools are marked at two sides of the cargo tank;
arranging 4 temporary saddles in an inner field, wherein the sizes of the temporary saddles are the same as those of saddles installed on the ship body in sections, each two temporary saddles correspond to one cargo tank, the first cargo tank and the second cargo tank are respectively laid on the temporary saddles by using a gantry crane, the arrangement positions of the temporary saddles are positioned on the inner sides of the installation positions of laminated wood at the bottoms of the cargo tanks, and the temporary saddles and the installation positions of the laminated wood are arranged in parallel;
step three, respectively welding a first step bridge section and a second step bridge section on the top of the first cargo tank and the top of the second cargo tank, respectively welding step bridge railings on the first step bridge section and the second step bridge section, reserving closure gaps at closure ends of the first step bridge section and the second step bridge section, welding watertight partition plates on the cargo tanks below the first step bridge and the second step bridge, and respectively welding a positioning tool on two sides of the first cargo tank and the second cargo tank according to marks;
step four, installing laminated wood at the bottom of the cargo tank, pouring epoxy between the laminated wood and the cargo tank, and after epoxy pouring is completed, supporting the bottom of each laminated wood by using a wood bracket until the epoxy is cured;
hoisting the first cargo tank and the second cargo tank again by using a gantry crane, uniformly arranging a layer of adjusting cork on a panel of the temporary saddle, respectively moving two temporary saddles corresponding to each cargo tank to the lower parts of laminated wood, controlling the gantry crane to stably drop the cargo tanks on the temporary saddle, and enabling the laminated wood at the bottom of the cargo tanks to correspond to the positions of the adjusting cork on the panel of the saddle;
step six, carrying out water pressure test on the cargo tank;
seventhly, coating operation is carried out on the cargo tank;
step eight, hoisting the cargo tank to the position above a saddle of the ship body section by using a gantry crane through the combined action of a limiting tool for limiting the cargo tank on the periphery of the cargo tank and a positioning tool for positioning the cargo tank, and stopping the cargo tank from falling when the gap between laminated wood and a saddle panel meets the thickness requirement of epoxy pouring;
step nine, performing epoxy pouring filling on a gap between the laminated wood and the saddle panel from low to high, after the epoxy pouring is finished, slowly loosening the cargo tank to enable the cargo tank to be completely fallen on the saddle, completely filling the gap between the saddle panel and the laminated wood, removing redundant epoxy resin overflowing from the two sides of the saddle, finishing the hoisting, and removing a gantry crane hook lock;
step ten, connecting the folding ends between the first-step bridge section and the second-step bridge section by using steel plates to finish the integral hoisting of the first cargo tank and the second cargo tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211616578.0A CN115959260A (en) | 2022-12-15 | 2022-12-15 | Full-pressure type LPG transport ship cargo tank integrity hoisting construction process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211616578.0A CN115959260A (en) | 2022-12-15 | 2022-12-15 | Full-pressure type LPG transport ship cargo tank integrity hoisting construction process |
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| Publication Number | Publication Date |
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| CN115959260A true CN115959260A (en) | 2023-04-14 |
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| CN202211616578.0A Pending CN115959260A (en) | 2022-12-15 | 2022-12-15 | Full-pressure type LPG transport ship cargo tank integrity hoisting construction process |
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| CN114857432A (en) * | 2022-04-29 | 2022-08-05 | 中船广西船舶及海洋工程有限公司 | Reinforcing method for hydraulic test of liquid tank |
| CN114954833A (en) * | 2022-04-12 | 2022-08-30 | 启东集胜造船有限公司 | Balance hoisting process for liquid tank of chemical ship |
| CN114987684A (en) * | 2022-07-01 | 2022-09-02 | 上海外高桥造船有限公司 | Saddle structure for LNG (liquefied Natural gas) tank of dual-fuel ship |
-
2022
- 2022-12-15 CN CN202211616578.0A patent/CN115959260A/en active Pending
Patent Citations (14)
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| US20100012014A1 (en) * | 2008-07-09 | 2010-01-21 | John Randolph Holland | Systems and methods for supporting tanks in a cargo ship |
| US20130092073A1 (en) * | 2010-06-18 | 2013-04-18 | Brevik Technology, A.S. | Support of tanks in vessels |
| CN102923250A (en) * | 2012-06-27 | 2013-02-13 | 武汉一冶钢结构有限责任公司 | Installation method of shipborne liquid cargo tank saddle seat reinforced by using laminated wood |
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